"Lunarium" clock:

Position
of the Moon around the Earth

Mechanical device showing the
Moon around the Earth. It is equivalent to a globe, with an
additionnal sphere for the Moon.

Presentation:

This clock is made from the mechanism of an ancient church tower
(19th century), without bell, on which I installed an Earth
represented by a 300mm-diameter globe. The continents are manually
engraved in the tin layer, letting the underneath brass to appear.

The Earth rotates in 24h, as the clock works. The face shows the
time in 12h format.

A steel arm holds the Earth axle and the gears for the Moon,
which rotates around the Earth in 27.321 days.